Lubricating oil system pipeline flushing system and control method

Abstract

The present application relates to a lubricating oil system pipeline flushing system and control method, which aims to solve the technical problem that after the bearing equipment of the unit is installed, if the lubricating pipeline cannot be cleaned, the bearing of the unit will be damaged. The system includes an oil inlet pipeline, an oil return pipeline and a flushing oil tank. The oil inlet pipeline is provided with an oil inlet supply pump, an oil supply pressure detection device and an oil supply control valve. The return oil pipeline is provided with a return oil regulating valve, an oil detection device for detecting the quality of the return oil and a return oil filter. The flushing oil tank is connected with an oil transfer assembly for inputting or outputting the lubricating oil into or out of the flushing oil tank. The data output end of the oil detection device is connected to a main control device to output an oil quality signal. The signal control end of the oil supply control valve and the return oil regulating valve is connected to the main control device. The data output end of the main control device is connected to the oil inlet supply pump to control the oil inlet supply pump in response to the oil quality signal to adjust the flow rate. The present application has the effect of facilitating the thorough cleaning of the lubrication system.

Description

Technical Field

[0001] The present application relates to the field of power generation equipment, and in particular to a lubricating oil system pipeline flushing system and a control method. Background Art

[0002] A unit refers to a complete set of equipment used in the field of power generation. The equipment in the field of power generation includes steam turbines, phase regulators and other ancillary equipment.

[0003] Large bearings are often used at the rotors of large rotating equipment such as steam turbines and phase regulators in the unit to reduce friction, thereby reducing the thermal power loss during the power generation process. In order to ensure the normal operation of the unit, a lubrication system is generally used to lubricate the bearings. The lubrication system includes a control center, a lubricating oil tank, an oil outlet pipe, an oil return pipe, an oil cooling device, and a pumping device. One end of the oil outlet pipe is connected to the lubricating oil tank, and the other end is connected to one end of the unit shaft bearing; the other end of the unit shaft bearing is connected to the oil return pipe, and the other end of the oil return pipe is connected to the oil cooling device, and the other end of the oil cooling device is connected to the lubricating oil tank. The pumping device is used to supply oil to the unit. The oil supply is that the pumping device pressurizes the lubricating oil in the lubricating oil tank, so that the lubricating oil flows through the oil outlet pipe to the bearing of the unit shaft for lubrication and is transported back to the lubricating oil tank through the oil return pipe.

[0004] During the installation of the above-mentioned lubrication system, the inventors found that the above-mentioned technology has at least the following problems: the unit has a large number of bearing devices and requires different pipe diameters for adaptation. After the unit bearings are installed, if the pipes of the lubrication system cannot be cleaned, the impurities remaining in the lubrication pipes will be transported to the unit bearings by the lubricating oil, thereby causing damage to the unit bearings, so there is room for improvement. Summary of the invention

[0005] In order to facilitate the cleaning of the pipeline after the installation of the unit is completed, the present application provides a lubricating oil system pipeline flushing system and a control method.

[0006] In a first aspect, the present application provides a lubricating oil system pipeline flushing system, which adopts the following technical solution:

[0007] A lubricating oil system pipeline flushing system, comprising an oil inlet pipeline for connecting to an oil inlet of the lubricating system, an oil return pipeline for connecting to an oil outlet of the lubricating system and a flushing oil tank for storing lubricating oil, the oil inlet pipeline is provided with an oil supply pump for pumping the lubricating oil in the flushing oil tank into the oil inlet pipeline, an oil supply pressure detection device for detecting the oil supply pressure and an oil supply control valve for controlling the on-off of the oil inlet pipeline, the return oil pipeline is provided with a return oil regulating valve for controlling the on-off of the return oil pipeline, an oil detection device for detecting the quality of return oil and a return oil filter device for filtering the lubricating oil entering the flushing oil tank, the flushing oil tank is connected to an oil transfer assembly for inputting or outputting the lubricating oil into or out of the flushing oil tank, the data output end of the oil detection device is connected to a main control device to output an oil quality signal, the signal control ends of the oil supply control valve and the return oil regulating valve are connected to the main control device, and the data output end of the main control device is connected to the oil inlet supply pump to control the oil inlet supply pump in response to the oil quality signal to adjust the flow rate.

[0008] By adopting the above technical scheme, the oil supply control valve can control the on-off of the oil supply pipeline, and the return oil regulating valve can control the on-off of the return oil pipeline. The main control device obtains the oil quality signal and sends a start command to the oil inlet supply pump after controlling the oil supply control valve and the return oil regulating valve to open. The oil inlet supply pump outputs lubricating oil of a predetermined oil supply pressure to flush the lubrication system according to the command of the main control device, and filters it through the return oil filter device, thereby effectively flushing the lubrication system of the bearing, reducing foreign particles in the lubrication system, and thus reducing the failure rate of the unit bearings caused by particles.

[0009] In a specific possible implementation scheme, the oil transfer assembly includes a two-way oil transfer supply pump, an oil transfer control valve, and an oil transfer pipeline for connecting the flushing oil tank and the lubricating oil station. The oil transfer control valve is arranged at one end of the oil transfer pipeline away from the flushing oil tank, and the oil transfer supply pump is arranged in the oil transfer pipeline and is used to input or output lubricating oil into or out of the flushing oil tank.

[0010] By adopting the above technical solution, the oil transfer pipeline in the oil transfer assembly is directly connected to the lubricating oil station, so that the lubricating oil in the lubricating oil station can be pumped out by the oil transfer supply pump and put into the flushing oil tank and directly flushed by closing the oil transfer control valve; at the same time, when the entire flushing is completed, the oil transfer control valve can be opened to allow the oil transfer supply pump to directly transport the lubricating oil in the flushing oil tank back to the lubricating oil station for reuse, thereby saving the cost of lubricating oil.

[0011] In a specific feasible implementation scheme, the oil transfer pipeline is located on the side of the oil transfer control valve close to the flushing oil tank and is provided with an internal circulation pipeline connected to the flushing oil tank. The internal circulation pipeline is provided with an internal circulation cut-off valve for controlling the on-and-off of the internal circulation pipeline, a heating device for adjusting the temperature of the lubricating oil, a cooling device for cooling the lubricating oil, and an internal circulation filter for filtering the lubricating oil; a circulation control valve for short-circuiting the oil inlet pipeline and the oil return pipeline is provided between the oil inlet pipeline and the oil return pipeline.

[0012] By adopting the above technical scheme, the lubricating oil needs to be filtered before it is sent back to the lubricating oil station. Therefore, the main control device opens the internal circulation shut-off valve, closes the oil transfer control valve, and then drives the oil transfer pump to extract the lubricating oil from the flushing tank. The heating device and the cooling device on the internal circulation pipeline can adjust the temperature of the lubricating oil, thereby facilitating the temperature adjustment of the lubricating oil and making flushing more convenient. On the other hand, the lubricating oil can be filtered in the flushing tank through the internal circulation filter on the internal circulation pipeline, thereby facilitating the recycling of the lubricating oil and reducing waste.

[0013] In a second aspect, the present application provides a control method for a lubricating oil system pipeline flushing system, which adopts the following technical solution:

[0014] A control method for a lubricating oil system pipeline flushing system, characterized in that the method is based on the above-mentioned main control device, and the method comprises:

[0015] Receive instructions to connect the flushing system to the lubrication system and short-circuit the unit bearings;

[0016] Control the oil transfer control valve to open and control the oil transfer oil supply pump to supply oil to the flushing oil tank to a preset lubricating oil height;

[0017] Control the circulation control valve to close, the oil supply control valve to open, the oil return regulating valve to open and control the oil inlet and oil supply pump to start;

[0018] Adjust the oil supply pressure and oil temperature to flush until the oil quality signal reaches the preset cleanliness standard;

[0019] Instructions for flushing completion are displayed and the flushing system can be removed.

[0020] By adopting the above technical scheme, the main control device can control the on-off of the oil supply pipeline by controlling the oil supply control valve, and can control the on-off of the oil return pipeline by controlling the oil return regulating valve; the main control device obtains the oil quality signal and sends a start command to the oil inlet supply pump after controlling the oil supply control valve and the oil return regulating valve to open, and the oil inlet supply pump outputs lubricating oil of a predetermined oil supply pressure according to the command of the main control device to flush the lubrication pipeline at the bearing, and flushes by adjusting the oil supply pressure and the oil temperature, and then filters through the return oil filter device, thereby effectively flushing the lubrication system, reducing the particles in the lubrication system, and thus reducing the failure rate of the unit bearings caused by particles.

[0021] In a specific implementation scheme, the step of adjusting the oil supply pressure and the oil temperature to flush until the oil quality signal reaches a preset cleanliness standard includes:

[0022] Step 1, adjusting the oil supply temperature so that the oil supply temperature is at a first preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a first preset time;

[0023] Step 2, adjusting the oil supply temperature so that the oil supply temperature is at a second preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at the first preset flow rate and maintained for a second preset time;

[0024] Step 3, adjusting the oil supply temperature so that the oil supply temperature is at a second preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a third preset time;

[0025] Repeat steps 1 to 3 until the oil quality signal reaches the preset cleanliness standard.

[0026] By adopting the above technical solution, during the process of adjusting the oil supply pressure and the oil temperature, the main control device pre-adjusts the oil supply temperature to a lower first preset temperature, and controls the flow rate to a higher first preset flow rate for pre-flushing, and then adjusts the oil temperature to a higher second preset temperature, and then adjusts the flow rate to a lower second preset flow rate, so that the lubricating oil can slow down and fully dissolve and soften the fine particles in the lubrication system, and then increases the flow rate for flushing, and repeats the above process until the oil quality signal reaches the preset cleanliness standard, thereby thoroughly cleaning the lubrication system of the bearing.

[0027] In a specific implementation scheme, the cycle of steps 1 to 3 until the oil quality signal reaches a preset cleanliness standard includes:

[0028] When step 3 is completed, loop step 1 to step 3;

[0029] After each step of the cycle from step 1 to step 3 is completed, an oil quality signal is obtained;

[0030] If the oil quality signal is below the preset cleanliness standard, the instruction to release the bearing short circuit is displayed;

[0031] When the instruction to release the bearing short circuit is received, steps one to three are circulated again until the oil quality signal is below the preset cleanliness standard and the flushing process is stopped.

[0032] By adopting the above technical solution, in order to detect the oil quality signal during the repeated cycle, it is necessary to detect the oil quality signal in real time, which will result in a large amount of data; therefore, a detection is performed once after each step is completed, which can reduce data redundancy and save computing resources while monitoring the oil quality signal; at the same time, the bearing can also be flushed to reduce debris particles remaining during the installation process.

[0033] In a specific implementation scheme, the step of adjusting the oil supply pressure and the oil temperature to perform flushing until the oil quality signal reaches a preset cleanliness standard further includes:

[0034] adjusting the opening of the oil return regulating valve so that the oil supply pressure increases and is maintained for a fourth preset time;

[0035] Displays the instruction to check the return oil filter device and obtains the instruction that the return oil filter device has been cleaned.

[0036] By adopting the above technical solution, the main control device pre-adjusts the opening of the return oil regulating valve before adjusting the oil supply pressure and oil temperature after starting the oil supply pump. At this time, since the outlet of the return oil regulating valve is reduced, the back pressure in the pipeline will increase, so the flushing force is greater. At this time, maintaining the fourth preset time can flush some large particles. After flushing, the inspection is displayed and an instruction to complete the inspection is obtained, so that large particles and debris can be pre-flushed, which facilitates more thorough cleaning.

[0037] In a specific embodiment, before displaying the instruction of flushing completion and displaying the detachable flushing system, the method further includes:

[0038] The control circulation control valve and the internal circulation cut-off valve are opened, and the oil transfer control valve, the oil supply control valve and the oil return regulating valve are closed;

[0039] The oil transfer supply pump and the oil inlet supply pump are controlled to start to pump lubricating oil from the flushing tank until the oil quality signal is below the preset cleanliness standard.

[0040] By adopting the above technical solution, before the overall flushing system is dismantled, the control circulation control valve and the internal circulation shut-off valve are opened in advance, and the oil transfer control valve, the oil supply control valve and the oil return regulating valve are closed. At this time, the lubricating oil flows in the internal circulation pipeline. At this time, the control oil transfer supply pump and the oil inlet supply pump are started to draw the lubricating oil from the flushing oil tank and return it to the flushing oil tank through the internal circulation pipeline. The remaining lubricating oil in the flushing oil tank can be filtered and cleaned, thereby improving the cleanliness of the lubricating oil inside the flushing oil tank.

[0041] In a specific embodiment, the control of the oil transfer pump and the oil inlet pump to start to pump the lubricating oil from the flushing tank until the oil quality signal is below the preset cleanliness standard further includes:

[0042] Control the internal circulation cut-off valve to close and the oil transfer control valve to open;

[0043] Control the oil transfer pump to start and transport the lubricating oil in the flushing oil tank to the outside.

[0044] By adopting the above technical solution, after the lubricating oil in the flushing oil tank is cleaned, the oil transfer control valve is opened, and the lubricating oil in the flushing oil tank can be transferred to the lubricating oil station through the oil transfer supply pump, thereby saving lubricating oil and reducing lubricating oil waste.

[0045] In summary, the present application includes at least one of the following beneficial technical effects:

[0046] 1. The main control device can control the on-off of the oil supply pipeline by controlling the oil supply control valve, and can control the on-off of the oil return pipeline by controlling the oil return regulating valve; after the main control device controls the oil supply control valve and the oil return regulating valve to open, it obtains the oil quality signal and sends a start command to the oil supply pump. The oil supply pump outputs lubricating oil with a predetermined oil supply pressure according to the command of the main control device to flush the lubrication system of the bearing, and flushes by adjusting the oil supply pressure and oil temperature, and then filters through the return oil filter device, thereby effectively flushing the lubrication system, reducing particles at the bearing, and thus reducing the failure rate of the unit bearing caused by particles;

[0047] 2. After starting the oil supply pump and before adjusting the oil supply pressure and oil temperature, the main control device pre-adjusts the opening of the return oil regulating valve to perform high-flow pre-flushing. On the other hand, by adjusting the oil supply pressure and oil temperature, the lubricating oil is flushed in the lubrication system at different flow rates and temperatures, making it easier to thoroughly clean the lubrication system.

[0048] 3. Before dismantling the entire flushing system, open the control circulation control valve and the internal circulation shut-off valve in advance, and close the oil transfer control valve, oil supply control valve and oil return regulating valve. At this time, the lubricating oil flows in the internal circulation pipeline. At this time, the control oil transfer supply pump and the oil inlet supply pump are started to draw the lubricating oil from the flushing tank and return it to the flushing tank through the internal circulation pipeline. The remaining lubricating oil in the flushing tank can be filtered and cleaned, and then the cleaned lubricating oil can be returned to the lubricating oil station, thereby saving lubricating oil resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall structure of a lubricating oil system pipeline flushing system in an embodiment of the present application;

[0050] Figure 2 It is a flow chart of a control method of a lubricating oil system pipeline flushing system in an embodiment of the present application;

[0051] Figure 3 It is a schematic table of recommended flow rates in the embodiments of the present application.

[0052] Explanation of the reference numerals in the accompanying drawings: 1. Flushing oil tank; 2. Oil inlet pipeline; 21. Oil inlet supply pump; 22. Oil supply pressure detection device; 23. Oil supply control valve; 24. Oil outlet filtering device; 3. Return oil pipeline; 31. Return oil regulating valve; 32. Oil detection device; 33. Return oil filtering device; 4. Main control device; 41. Circulation control valve; 5. Oil transfer assembly; 51. Oil transfer supply pump; 52. Oil transfer control valve; 53. Oil transfer pipeline; 6. Internal circulation pipeline; 61. Internal circulation shut-off valve; 62. Heating device; 63. Cooling device; 64. First filter; 65. Second filter. DETAILED DESCRIPTION

[0053] The following is combined with Figure 1-3 This application is described in further detail.

[0054] The present application embodiment discloses a lubricating oil system pipeline flushing system. Figure 1 The lubricating oil system pipeline flushing system includes a flushing oil tank 1, an oil inlet pipeline 2 and an oil return pipeline 3. One end of the oil inlet pipeline 2 is connected to the flushing oil tank 1, and the other end is connected to the oil inlet of the lubrication system; similarly, one end of the return oil pipeline 3 is connected to the oil outlet of the lubrication system, and the other end is connected to the flushing oil tank 1.

[0055] The lubrication system from the flushing oil tank 1 to the unit bearing on the oil inlet pipeline 2 is sequentially installed with an oil inlet supply pump 21, an oil supply pressure detection device 22 and an oil supply control valve 23. Among them, the oil inlet supply pump 21 can be an oil pump driven by a variable frequency motor, and the flow rate can be adjusted by variable frequency regulation. The oil inlet supply pump 21 is used to pump the lubricating oil in the flushing oil tank 1 into the oil inlet pipeline 2. The oil supply pressure detection device 22 can be a pressure sensor to detect the oil supply pressure in the oil supply pipeline. In addition, the oil supply control valve 23 is installed on the oil inlet pipeline 2 to control the on and off of the oil inlet pipeline 2. At the same time, the oil supply control valve 23 is a regulating valve that can receive electrical signals to adjust the valve opening. The oil inlet pipeline 2 is also installed with an oil outlet filter device 24 for filtering the lubricating oil. The oil outlet filter device can be a double filter, and the filter element can be replaced online.

[0056] The return oil regulating valve 31, the oil detection device 32 and the return oil filtering device 33 are sequentially installed on the return oil pipeline 3. Among them, the return oil regulating valve 31 is installed at the end of the return oil pipeline 3 away from the flushing oil tank 1. The return oil regulating valve 31 is a regulating valve that can receive electrical signals to adjust the valve opening. The oil detection device 32 can be an oil detector with an oil contamination particle measurement function, so it can display the oil cleanliness in real time. The return oil filtering device 33 can be a filter net to filter the refluxed lubricating oil.

[0057] The signal control end of the oil detection device 32 is connected to the main control device 4, which can be an electric control cabinet with a PLC or an industrial computer, as long as it can realize the automatic control command sending and information receiving. A liquid level meter and a temperature meter are also installed on the flushing oil tank 1, both of which are connected to the main control device 4 to transmit data to the main control device 4. The control end of the above-mentioned oil inlet supply pump 21 is electrically connected to the main control device 4 to output an oil quality signal to the main control device 4, and the control end of the oil supply control valve 23, the control end of the return oil regulating valve 31 and the data output end of the oil supply pressure detection device 22 are all electrically connected to the main control device 4 to respond to the oil quality signal, thereby adjusting the flow rate of the lubricating oil flowing through the oil supply pipeline, the lubrication system and the return oil pipeline, so as to facilitate the flushing of the lubrication system.

[0058] The flushing oil tank 1 is also connected to an oil transfer assembly 5 for inputting or outputting lubricating oil into or out of the flushing oil tank 1. The oil transfer assembly 5 includes an oil transfer supply pump 51, an oil transfer control valve 52, and an oil transfer pipeline 53 for connecting the flushing oil tank 1 and the lubricating oil station. The oil transfer control valve 52 is installed at one end of the oil transfer pipeline 53 away from the flushing oil tank 1. The oil transfer supply pump 51 is installed in the oil transfer pipeline 53. The oil transfer supply pump 51 can be a gear pump driven by a motor with forward and reverse functions, and is used to input or output lubricating oil into or out of the flushing oil tank 1.

[0059] The oil transfer pipeline 53 is located on the side of the oil transfer control valve 52 close to the flushing oil tank 1 and is connected to the internal circulation pipeline 6 through a tee. The other end of the internal circulation pipeline 6 is connected to the flushing oil tank 1, thereby forming an internal circulation process from the oil transfer pump 51, the internal circulation pipeline 6 to the flushing oil tank 1. The internal circulation shut-off valve 61, the heating device 62 and the cooling device 63 are installed on the internal circulation pipeline 6. The internal circulation shut-off valve 61 can be a shut-off valve, the heating device 62 can be an electric heater, and the cooling device 63 can be an air-cooled heat exchanger. In order to further filter the oil, a first filter 64 can also be installed in the internal circulation pipeline 6, and a second filter 65 can also be installed at one end of the internal circulation pipeline 6 inserted in the flushing oil tank 1, so as to filter the oil. A circulation control valve 41 for short-circuiting the oil inlet pipeline 2 and the oil return pipeline 3 is provided between the oil inlet pipeline 2 and the oil return pipeline 3. The control ends of the circulation control valve 41 , the internal circulation shut-off valve 61 , the heating device 62 and the cooling device 63 are all connected to the main control device 4 , so that the temperature of the lubricating oil is adjusted under the control of the main control device 4 .

[0060] The implementation principle of a lubricating oil system pipeline flushing system in the embodiment of the present application is:

[0061] After the unit bearing is installed, the oil inlet pipeline 2 is connected to the oil inlet of the lubrication system, the oil return pipeline 3 is connected to the oil outlet of the lubrication system, and the main control device 4 is connected to each component. Before flushing the lubrication system, the main control device 4 controls the oil transfer control valve 52 to open in advance, and then starts the oil transfer pump 51 to extract the lubricating oil from the lubricating oil station and inject it into the flushing oil tank 1. When the lubricating oil level in the flushing oil tank 1 reaches a predetermined height, start the oil inlet pump 21 so that the lubricating oil in the pipeline flushes the pipeline under a certain pressure. After flushing for a period of time, the main control device 4 controls the oil transfer control valve 52 to close, and the internal circulation cut-off valve 61 and the heating device 62 to open, so as to heat the lubricating oil and raise the temperature of the lubricating oil to a predetermined value. The main control device 4 controls the oil transfer pump 21 to start again, and flushes the lubrication system again, so as to thoroughly clean the lubrication system.

[0062] Based on the same technical concept, the present application also discloses a control method for a lubricating oil system pipeline flushing system. The control method is based on the above-mentioned lubricating oil system pipeline flushing system. The executor of the whole method is the main control device 4, and the main control device 4 executes control instructions to achieve thorough flushing of the lubrication system.

[0063] The following will be combined with specific implementation methods. Figure 2 The processing flow shown is described in detail, and the content can be as follows:

[0064] Step 201, receiving an instruction to connect the flushing system to the lubrication system and short-circuit the unit bearings.

[0065] In practice, before flushing the lubrication pipeline of the unit bearing, the unit bearing needs to be short-circuited, that is, the oil inlet pipe and the oil outlet pipe of the unit bearing are connected. Then the flushing system is pre-connected to the lubrication system. After the connection is completed, an instruction that the flushing system has been connected to the lubrication system and the unit bearing is short-circuited will be input to the main control device 4 of the flushing system. Therefore, the main control device 4 can receive the instruction that the flushing system is connected to the lubrication system and the unit bearing is short-circuited. After receiving such an instruction, the flushing system can be controlled to clean the bearing.

[0066] Step 202, control the oil transfer control valve 52 to open and control the oil transfer supply pump 51 to supply oil into the flushing oil tank 1 to a preset lubricating oil height.

[0067] In practice, after receiving the instruction for the flushing system to be connected to the lubrication system, the main control device 4 controls the oil transfer control valve 52 to open, and controls the oil transfer supply pump 51 to supply oil to the flushing oil tank 1 to the preset lubrication oil height. Since the flushing system needs to be flushed with lubrication oil during the entire process, the oil transfer supply pump 51 draws lubrication oil from the lubrication oil station and injects it into the flushing oil tank 1. In this way, it is convenient to directly draw lubrication oil from the flushing oil tank 1 for flushing during the later flushing process.

[0068] Step 203, control the circulation control valve 41 to close, the oil supply control valve 23 to open, the oil return regulating valve 31 to open, and control the oil inlet supply pump 21 to start.

[0069] In practice, when the lubricating oil level in the flushing oil tank 1 reaches a preset height under the delivery of the oil transfer supply pump 51, the main control device 4 controls the circulation control valve 41 to close, the oil supply control valve 23 to open, the oil return regulating valve 31 to open, and controls the oil inlet supply pump 21 to start. In this way, the oil inlet pipeline 2 and the oil return pipeline 3 can be opened, so that the oil inlet supply pump 21 can pressurize the lubricating oil to flush the lubrication system.

[0070] Step 204 , adjusting the oil supply pressure and the oil temperature to perform flushing until the oil quality signal reaches a preset cleanliness standard.

[0071] In practice, after starting the oil inlet supply pump 21, the main control device 4 adjusts the oil supply pressure and oil temperature to perform flushing until the oil quality signal reaches the preset cleanliness standard. The preset cleanliness standard may be level 7 of NAS 1638 or 18 / 16 / 13 of ISO 4406. The oil supply pressure is adjusted by adjusting the operating frequency of the oil inlet supply pump 21, thereby affecting the flow rate, and the oil temperature is adjusted by the heating device 62 and the cooling device 63. In this way, the lubrication system is flushed to different degrees by different oil temperatures and flow rates, thereby improving the cleanliness of the bearing.

[0072] Step 205, displaying the instruction of flushing completion and displaying the detachable flushing system.

[0073] In practice, after the cleanliness of the lubricating oil reaches a preset cleanliness standard, the main control device 4 displays an instruction indicating that flushing is complete and that the flushing system can be removed. At this point, the lubricating system has been flushed and the flushing system can be removed.

[0074] Optionally, in order to control the flushing process so as to flush more thoroughly, step 204 may also include the following processing:

[0075] Step 1: adjusting the oil supply temperature so that the oil supply temperature is at a first preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a first preset time.

[0076] In implementation, after starting the oil inlet supply pump 21, the main control device 4 pre-adjusts the oil supply temperature so that the oil supply temperature is at the first preset temperature. At this time, the oil supply pressure is adjusted so that the flow rate of the lubricating oil is maintained at the first preset flow rate for the first preset time. Among them, the first preset temperature range is 25°C to 35°C, and the first preset time can be 4h. In this way, the lubricating oil flowing in the pipeline can be turbulent. In order to ensure turbulent flow, the Reynolds number Re≥4000 is usually set, and the Reynolds number Re= (v×d) / μ, where: d-pipeline inner diameter, unit: m; v-average flow rate of the fluid, unit: m / s; μ-kinematic viscosity of the fluid, unit: m2 / s. The relationship between pipeline flow rate and flow rate is pipeline flow rate Q= (d×d×v) / 21.16; among them: d-pipeline inner diameter, unit: mm; Q-flow rate, unit: L / min; v-average flow rate of the fluid, unit: m / s, for recommended flushing flow rates for different pipeline diameters, see Figure 3 .

[0077] Step 2: adjusting the oil supply temperature so that the oil supply temperature is at a second preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a second preset time.

[0078] In implementation, after the main control device 4 maintains the lubricating oil at the first preset temperature and the first preset flow rate for the first preset time, it adjusts the oil supply temperature so that the oil supply temperature is at the second preset temperature and adjusts the oil supply pressure so that the lubricating oil flow rate is at the first preset flow rate and maintained for the second preset time. The second preset temperature range is 60°C to 70°C, and the second preset flow rate is smaller than the first preset flow rate. In this way, the high-temperature and low-flow lubricating oil can soften the debris particles and facilitate flushing out. The second preset time can be the same as the first preset time, or it can be different, and it can be set as needed. In this embodiment, it is preferably the same.

[0079] Step three, adjusting the oil supply temperature so that the oil supply temperature is at a second preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a third preset time.

[0080] In practice, after the main control device 4 maintains the lubricating oil at the first preset temperature and the first preset flow rate for the first preset time, it adjusts the oil supply temperature so that the oil supply temperature is at the second preset temperature and adjusts the oil supply pressure so that the lubricating oil flow rate is at the first preset flow rate and is maintained for the third preset time. In this way, the flow rate of the lubricating oil is controlled to increase, and flushing is performed again, so that the softened impurities can be flushed out of the lubrication system.

[0081] Repeat steps 1 to 3 until the oil quality signal reaches the preset cleanliness standard.

[0082] In practice, after executing step 3, the main control device 4 loops through the operations of step 1 to step 3 until the oil quality signal reaches a preset cleanliness standard and then controls the oil inlet supply pump 21 to stop working.

[0083] Optionally, in order to reduce the number of times the oil quality signal is collected and reduce the burden of data processing, the above-mentioned processing cycle from step 1 to step 3 until the oil quality signal reaches a preset cleanliness standard may specifically include the following processing:

[0084] When step 3 is completed, steps 1 to 3 are repeated.

[0085] In implementation, after step three is completed, the operations of step one to step three are executed in a loop.

[0086] After each step of the cycle from step 1 to step 3 is completed, the oil quality signal is obtained.

[0087] In implementation, during the process of cyclically executing step 1 to step 3, an oil quality signal is obtained each time a step is completed.

[0088] If the oil quality signal is below the preset cleanliness standard, the instruction to release the bearing short circuit is displayed.

[0089] In practice, each time the oil quality signal is obtained, the oil quality signal is compared with the preset cleanliness standard. If the oil quality signal is less than or equal to the preset cleanliness standard, the instruction to release the bearing short circuit is displayed, and the short circuit at the unit bearing is released. In this way, the unit bearing can be flushed; at the same time, the oil detection device 32 is not required to detect the oil quality signal in real time and compare it, which reduces the amount of data processed by the main control device 4.

[0090] When the instruction to release the bearing short circuit is received, steps one to three are circulated again until the oil quality signal is below the preset cleanliness standard and the flushing process is stopped.

[0091] During implementation, when the instruction to release the bearing short circuit is received, it indicates that the short circuit at the bearing has been released. At this time, steps one to three are cycled again, and the oil quality signal is monitored in real time until the oil quality signal is below the preset cleanliness standard and the flushing process is stopped. The bearing can also be flushed to reduce debris generated during the installation process.

[0092] Furthermore, in order to pre-flush the large particles in the lubrication system, the following processing may be included before step 204:

[0093] The opening degree of the oil return regulating valve 31 is adjusted so that the oil supply pressure increases and is maintained for a fourth preset time.

[0094] The oil return regulating valve 31 is an automatic control valve, which can receive a command to adjust the valve opening.

[0095] In practice, after starting the oil inlet supply pump 21, the main control device 4 sends an adjustment instruction to the oil return regulating valve 31 to adjust the opening of the oil return regulating valve 31, so that the opening of the oil return regulating valve 31 becomes smaller. Since the output power of the oil inlet supply pump 21 is constant, when the opening is reduced, the lubricating oil pressure in the oil inlet pipeline and the oil return pipeline increases, so the oil supply pressure increases and the lubricating oil flow rate increases, and the current state is maintained until the fourth preset time, which can be 4 hours. In this way, the flushing speed can be increased, and some large particles can be removed in advance by flushing.

[0096] An instruction to check the return oil filter device 33 is displayed, and an instruction to clean the return oil filter device 33 is obtained.

[0097] In practice, after adjusting the opening of the return oil regulating valve 31 and maintaining the fourth time, the main control device 4 displays an instruction to check the return oil filter device 33 and obtains an instruction that the return oil filter device 33 has been cleaned. In this way, the return oil filter device 33 can be checked and cleaned in time, and after the cleaning is completed, the instruction that the cleaning is completed is input to the main control device 4, so as to facilitate the automatic control process of flushing in the next stage.

[0098] In order to clean the lubricating oil in the flushing oil tank 1 so that the lubricating oil can meet the standards and be reused, the following processing may be included before step 205:

[0099] The control circulation control valve 41 and the internal circulation cut-off valve 61 are opened, the oil transfer control valve 52, the oil supply control valve 23 and the oil return regulating valve 31 are closed, and the instruction to release the short circuit of the unit bearing is received.

[0100] In practice, before the main control device 4 displays the instruction of flushing completion and displays that the flushing system can be removed, it controls the circulation control valve 41 and the internal circulation cut-off valve 61 to open, and the oil transfer control valve 52, the oil supply control valve 23 and the oil return regulating valve 31 to close. In this way, the lubricating oil can be prevented from flowing through the bearing.

[0101] The oil transfer supply pump 51 and the oil inlet supply pump 21 are controlled to start to pump the lubricating oil from the flushing oil tank 1 until the oil quality signal is below the preset cleanliness standard.

[0102] In practice, after closing the oil transfer control valve 52, the oil supply control valve 23 and the return oil regulating valve 31, the main control device 4 controls the oil transfer supply pump 51 and the oil inlet supply pump 21 to start, and extracts the lubricating oil from the flushing oil tank 1 until the oil quality signal is below the preset cleanliness standard. When the oil transfer supply pump 51 starts to extract the lubricating oil, the lubricating oil is filtered by the third filter and the fourth filter and flows back to the flushing oil tank 1. In this way, the lubricating oil in the flushing oil tank 1 can be thoroughly cleaned.

[0103] Furthermore, in order to enable the lubricating oil to be used by the lubricating oil station, the process of controlling the oil transfer pump 51 and the oil inlet pump 21 to start to pump the lubricating oil from the flushing oil tank 1 until the oil quality signal is below the preset cleanliness standard may also include the following processes:

[0104] The internal circulation shut-off valve 61 is controlled to be closed, and the oil transfer control valve 52 is controlled to be opened.

[0105] During implementation, after the lubricant in the flushing oil tank 1 reaches below the preset cleanliness standard, the main control device 4 closes the internal circulation shut-off valve 61 and opens the return control valve. At this time, since the oil transfer pipeline 53 is connected to the lubricating oil station, the lubricating oil can be transferred back to the lubricating oil station.

[0106] The oil transfer supply pump 51 is controlled to start and the lubricating oil in the flushing oil tank 1 is transported outward.

[0107] In practice, after the oil transfer control valve 52 is opened, the main control device 4 controls the oil transfer pump 51 to start, and the oil transfer pump 51 transfers the lubricating oil in the flushing oil tank 1 to the outside. In this way, the lubricating oil that has been filtered in the flushing oil tank 1 can be pumped back to the lubricating oil station for recycling of the lubricating oil.

[0108] Based on the same technical concept, the embodiment of the present application also discloses the internal control structure of the main control device 4, which includes an instruction sending end and an instruction receiving end.

[0109] An instruction receiving end, used for receiving an instruction for connecting the flushing system to the lubrication system;

[0110] The command sending end is used to control the oil transfer control valve 52 to open and control the oil transfer supply pump 51 to supply oil to the flushing oil tank 1 to a preset lubricating oil height;

[0111] The instruction sending end is used to control the circulation control valve 41 to close, the oil supply control valve 23 to open, the return oil regulating valve 31 to open, and control the oil inlet supply pump 21 to start;

[0112] The command sending end is used to adjust the oil supply pressure and oil temperature for flushing until the oil quality signal reaches the preset cleanliness standard;

[0113] The command sending end is used to display the command of flushing completion and to display the detachable flushing system.

[0114] An embodiment of the present application further discloses a computer device, which includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed by a control method for a lubricating oil system pipeline flushing system as described above.

[0115] Based on the same technical concept, an embodiment of the present application also discloses a computer-readable storage medium, including various steps in the control method flow of the above-mentioned lubricating oil system pipeline flushing system that can be loaded and executed by a processor.

[0116] Computer-readable storage media include, for example, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0117] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories, random access memories, magnetic disks or optical disks.

[0118] As described above, the above embodiments are only used to introduce the technical solution of the present application in detail, but the description of the above embodiments is only used to help understand the method and core idea of ​​the present application and should not be understood as limiting the present application. Any changes or substitutions that can be easily thought of by technicians in this technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A lubricating oil system pipeline flushing system, Features: The invention comprises an oil inlet pipeline (2) for connecting to an oil inlet of a lubricating system, an oil return pipeline (3) for connecting to an oil outlet of the lubricating system, and a flushing oil tank (1) for storing lubricating oil. The oil inlet pipeline (2) is provided with an oil supply pump (21) for pumping the lubricating oil in the flushing oil tank (1) into the oil inlet pipeline (2), an oil supply pressure detection device (22) for detecting the oil supply pressure, and an oil supply control valve (23) for controlling the on-off of the oil inlet pipeline (2). The oil return pipeline (3) is provided with an oil return regulating valve (31) for controlling the on-off of the oil return pipeline (3). ), an oil detection device (32) for detecting the quality of the return oil, and a return oil filtering device (33) for filtering the lubricating oil entering the flushing oil tank (1); the flushing oil tank (1) is connected to an oil transfer assembly (5) for inputting or outputting the lubricating oil into or out of the flushing oil tank (1); the data output end of the oil detection device (32) is connected to a main control device (4) to output an oil quality signal; the signal control ends of the oil supply control valve (23) and the return oil regulating valve (31) are connected to the main control device (4); the data output end of the main control device (4) is connected to an oil inlet and supply pump (21) controls the oil supply pump (21) in response to the oil quality signal to adjust the flow rate; the oil transfer assembly (5) comprises a two-way oil transfer supply pump (51), an oil transfer control valve (52) and an oil transfer pipeline (53) for connecting the flushing oil tank (1) and the lubricating oil station, the oil transfer control valve (52) is arranged at one end of the oil transfer pipeline (53) away from the flushing oil tank (1), the oil transfer supply pump (51) is arranged in the oil transfer pipeline (53) and is used to input or output lubricating oil to or from the flushing oil tank (1); the oil transfer pipeline (53) is located at the oil transfer control valve (52) An internal circulation pipeline (6) connected to the flushing oil tank (1) is provided on a side close to the flushing oil tank (1), and an internal circulation shut-off valve (61) for controlling the on-off of the internal circulation pipeline (6), a heating device (62) for adjusting the temperature of the lubricating oil, a cooling device (63) for cooling the lubricating oil, and an internal circulation filter for filtering the lubricating oil are provided on the internal circulation pipeline (6); a circulation control valve (41) for short-circuiting the oil inlet pipeline (2) and the oil return pipeline (3) is provided between the oil inlet pipeline (2) and the oil return pipeline (3).

2. A control method for a lubricating oil system pipeline flushing system, It is characterized in that The method is based on the main control device (4) described in claim 1, and the method comprises: Receive instructions to connect the flushing system to the lubrication system and short-circuit the unit bearings; Controlling the oil transfer control valve (52) to open and controlling the oil transfer supply pump (51) to supply oil to the flushing oil tank (1) to a preset lubricating oil height; Control the circulation control valve (41) to close, the oil supply control valve (23) to open, the oil return regulating valve (31) to open, and control the oil inlet supply pump (21) to start; Adjust the oil supply pressure and oil temperature to flush until the oil quality signal reaches the preset cleanliness standard; Instructions for flushing completion are displayed and the flushing system can be removed.

3. The control method of the lubricating oil system pipeline flushing system according to claim 2, It is characterized in that The step of adjusting the oil supply pressure and the oil temperature to perform flushing until the oil quality signal reaches a preset cleanliness standard includes: Step 1, adjusting the oil supply temperature so that the oil supply temperature is at a first preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a first preset time; Step 2, adjusting the oil supply temperature so that the oil supply temperature is at a second preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at the first preset flow rate and maintained for a second preset time; Step 3, adjusting the oil supply temperature so that the oil supply temperature is at a second preset temperature and adjusting the oil supply pressure so that the lubricating oil flow rate is at a first preset flow rate and maintained for a third preset time; Repeat steps 1 to 3 until the oil quality signal reaches the preset cleanliness standard.

4. The control method of the lubricating oil system pipeline flushing system according to claim 3, It is characterized in that The step of cycling step 1 to step 3 until the oil quality signal reaches a preset cleanliness standard includes: When step 3 is completed, loop step 1 to step 3; After each step of the cycle from step 1 to step 3 is completed, an oil quality signal is obtained; If the oil quality signal is below the preset cleanliness standard, the instruction to release the bearing short circuit is displayed; When the instruction to release the bearing short circuit is received, steps one to three are circulated again until the oil quality signal is below the preset cleanliness standard and the flushing process is stopped.

5. The control method of the lubricating oil system pipeline flushing system according to claim 2, It is characterized in that Before the oil supply pressure and oil temperature are adjusted to perform flushing until the oil quality signal reaches a preset cleanliness standard, the method further includes: adjusting the opening of the oil return regulating valve (31) so that the oil supply pressure increases and is maintained for a fourth preset time; An instruction to check the return oil filter device (33) is displayed, and an instruction to complete cleaning the return oil filter device (33) is obtained.

6. The control method of the lubricating oil system pipeline flushing system according to claim 2, It is characterized in that Before displaying the flushing completion instruction and displaying that the flushing system can be removed, the method further includes: The control circulation control valve (41) and the internal circulation cut-off valve (61) are opened, and the oil transfer control valve (52), the oil supply control valve (23) and the oil return regulating valve (31) are closed; The oil transfer supply pump (51) and the oil inlet supply pump (21) are controlled to start up to pump lubricating oil from the flushing oil tank (1) until the oil quality signal is below a preset cleanliness standard.

7. The control method of the lubricating oil system pipeline flushing system according to claim 6, Features: The control oil supply pump (51) and the oil supply pump (21) are started to pump lubricating oil from the flushing oil tank (1) until the oil quality signal is below a preset cleanliness standard, and further comprises: Control the internal circulation cut-off valve (61) to close and the oil transfer control valve (52) to open; The oil transfer oil supply pump (51) is controlled to start and the lubricating oil in the flushing oil tank (1) is transported outward.

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